名词
1. a low pitch that is loud and voluminous
2. the extent downward or backward or inward
e.g. the depth of the water
depth of a shelf
depth of a closet
Synonym: depth
3. the quality of being physically deep
e.g. the profundity of the mine was almost a mile
Synonym: profundityprofoundness
4. the intellectual ability to penetrate deeply into ideas